期刊
MATERIALS CHEMISTRY AND PHYSICS
卷 239, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2019.122051
关键词
ZnO-CeO2 whiskers; Composite materials; Glucose sensor; Differential pulse voltammetry; Modified electrode
资金
- National Natural Science Foundation of China [51478285, 21407111]
- Natural Science Foundation of Jiangsu Province [BK20180971, B1C20180103]
- Collegiate Natural Science Fund of Jiangsu Province [16KJA430008]
- Jiangsu Collaborative Innovation Center of Technology and Material for Water Treatment Science and Technology Development Project of Suzhou [SYG201742, SYG201818]
- Young Foundation of Suzhou University of Science and technology [XKQ201612]
- People's Livelihood Technology Project Foundation of Suzhou Xiangcheng District [201709]
- Technology Development Project of Changshu [C5201801]
- Jiangsu Key Laboratory for Environment Functional Materials [SJHG1802]
Highly sensitive and accurate test of blood glucose level is important to protect people against diabetes. Herein, we develop a novel non-enzymatic electrochemical glucose detector by employing long whiskers as electrocatalyst for glucose oxidization. The detector consists of cerium oxide nano-whiskers decorated with zinc oxide nanoparticles. The ZnO-CeO2 nanocomposites are prepared through a hydrothermal synthesis process, in which the ultrathin petal carbon is introduced as template. The as-prepared material has a huge surface area, nontoxicity, and high electrocatalytic activity. The electrochemical analysis of ZnO-CeO2 glucose sensor is carried out by cyclic voltammetry (CV) and differential pulse voltammetry (DPV) with a potential window of 0-1 V in phosphate buffer solution (pH = 7.2). The nanocomposite shows a remarkable performance for detecting glucose with a linear range of 0.5-300 mu M, and a limit of detection (LOD) of 0.224 mu M (40 ppb). The differential pulse voltammetry results show an excellent linear relationship between current signal intensity and glucose concentration (R-2 = 0.99944). These results indicate that such non-enzymatic sensor based on nanocomposites could be an ideal method for detection of glucose.
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